kottke.org posts about Australia

In the past two weeks, the results of three surveys and studies about the Earth’s climate have been released: a paper on a possible dramatic climate shift, a survey of coral bleaching at the Great Barrier Reef, and a study on the West Antarctic ice sheet. All three investigations tell the story of climate change happening quicker than was previously anticipated.

Virtually all climate scientists agree with Dr. Hansen and his co-authors that society is not moving fast enough to reduce emissions of greenhouse gases, posing grave risks. The basic claim of the paper is that by burning fossil fuels at a prodigious pace and pouring heat-trapping gases into the atmosphere, humanity is about to provoke an abrupt climate shift.

Scientists who have dedicated their careers to studying the reef and its ecosystem say the current bleaching is unprecedented, and perhaps unrecoverable. The emotion in their responses so far have been palpable.

“I witnessed a sight underwater that no marine biologist, and no person with a love and appreciation for the natural world for that matter, wants to see,” said Australian coral scientist Jodie Rummer in a statement, after spending more than a month at a monitoring station in the Great Barrier Reef.

Though corals comprise only about 0.2 percent of the global oceans, they support perhaps a quarter of all marine species.

The great ice sheet, larger than Mexico, is thought to be potentially vulnerable to disintegration from a relatively small amount of global warming, and capable of raising the sea level by 12 feet or more should it break up. But researchers long assumed the worst effects would take hundreds — if not thousands — of years to occur.

Now, new research suggests the disaster scenario could play out much sooner.

Continued high emissions of heat-trapping gases could launch a disintegration of the ice sheet within decades, according to a study published Wednesday, heaving enough water into the ocean to raise the sea level as much as three feet by the end of this century.

You can think of the Earth as a massive machine, with many interconnected, resilient, and redundant systems. For a long time, humans thought it was too big for our actions to affect this machine in a meaningful way. But the Industrial Revolution’s release of hundreds of millions of years of stored greenhouse gases in less than 300 years put a strain on that entire machine. We didn’t notice that strain for a long time, but we’re starting to now in the form of higher temperatures, weird weather, bleaching coral reefs, rapidly melting ice sheets in Greenland & Antarctica, and dozens of other ways. I hope there’s still time to do something meaningful about it before the slower moving parts of the machine fail permanently.

The bureau’s head of climate monitoring and prediction David Jones said the new scale, which also features a pink code for temperatures from 52 to 54 degrees, reflected the potential for old heat records to be smashed.

“The scale has just been increased today and I would anticipate it is because the forecast coming from the bureau’s model is showing temperatures in excess of 50 degrees,” Jones told Fairfax newspapers.

Australia’s all-time record temperature is 50.7 degrees, set in January 1960 at Oodnadatta in the state of South Australia.

The nation as a whole experienced its hottest day on record on Monday with the average maximum temperature across the country hitting 40.33 degrees, surpassing the previous mark of 40.17 degrees set in 1972.

I feel like climate change needs a Steve Jobs to kick everyone’s ass into action on this, iPhone announcement-style. “Unprecedented polar ice cap melt, new colors on Australia’s weather map, massive East Coast hurricanes, are you getting it? These are not three separate incidents. This is one global pattern. And we are calling it anthropogenic climate change. [wild applause]” (via @ftrain)

Results: In the 18 years before the gun law reforms, there were 13 mass shootings in Australia, and none in the 10.5 years afterwards. Declines in firearm-related deaths before the law reforms accelerated after the reforms for total firearm deaths (p = 0.04), firearm suicides (p = 0.007) and firearm homicides (p = 0.15), but not for the smallest category of unintentional firearm deaths, which increased. No evidence of substitution effect for suicides or homicides was observed. The rates per 100 000 of total firearm deaths, firearm homicides and firearm suicides all at least doubled their existing rates of decline after the revised gun laws.

Conclusions: Australia’s 1996 gun law reforms were followed by more than a decade free of fatal mass shootings, and accelerated declines in firearm deaths, particularly suicides. Total homicide rates followed the same pattern. Removing large numbers of rapid-firing firearms from civilians may be an effective way of reducing mass shootings, firearm homicides and firearm suicides.

Australia celebrated Toad Day Out this past weekend, resulting in the deaths of thousands of toxic cane toads.

Cane toads were introduced to north Queensland canefields from South America in 1935 to eat pest beetles. The slimy interlopers couldn’t jump high enough to reach the beetles at the top of the cane stalks and, instead, rapidly spread in search of food. Millions of them now threaten many local species and spread diseases such as salmonella across northern Australia.

A French map shows that the Portuguese were the first Europeans to discover Australia in the early 1520s, almost 250 years before Captain Cook claimed them for Britain. “‘The Vallard cartographer has put these individual charts together like a jigsaw puzzle. Without clear compass markings its possible to join the southern chart in two different ways. My theory is it had been wrongly joined.’ Using a computer Trickett rotated the southern part of the Vallard map 90 degrees to produce a map which accurately depicts Australia’s east coast.”